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FeS2 nanoparticles embedded in N/S co-doped porous carbon fibers as anode for sodium-ion batteries

Journal Article


Abstract


  • FeS2 is a promising electrode material for sodium ion batteries (SIBs) because of its high theoretical capacity, rich reserves, and eco-friendly nature. In this study, N and S doped (N, S-co-doped) carbon fibers (CFs) encapsulated FeS2 nanoparticles (5ā€“12 nm) and adherent FeS2 nanoflakes (denoted as FeS2@CF-NS), were synthesized by electrostatic spinning and subsequent thermal treatment. In this structure, the FeS2 nanoparticles and the FeS2 nanoflakes shorten the Na+ diffusion distance; the N, S co-doping and defect-rich sites in the carbon fibers accelerate the Na+/eāˆ’ transmission and buffer the volume expansion during the Na-FeS2 conversion reaction. These merits synergistically contribute to the notable sodium storage performance of FeS2@CF-NS. As anode for Na-ion half batteries, the FeS2@CF-NS exhibits high capacity (637.1 mAh/g at 1 A/g after 400 cycles) and excellent rate capacity (431.1 mAh/g at 5 A/g). Kinetic analysis confirms that this composite structure stimulates the pseudocapacitance Na+ storage mechanism and enables a capacitive contribution ratio as high as 92.7% with respect to the total capacity. In combination with Na3V2(PO4)3-C cathode, the FeS2@CF-NS also achieves remarkably high specific capacity (561.1 mAh/g at 1 A/g after 500 cycles) and stable cyclability (338.6 mAh/g at 5 A/g after 5000 cycles) in full cells.

Authors


  •   Lu, Zhenxiao (external author)
  •   Zhai, Yanjun (external author)
  •   Wang, Nana
  •   Zhang, Yaohui (external author)
  •   Xue, Pan (external author)
  •   Guo, Meiqing (external author)
  •   Tang, Bin (external author)
  •   Huang, Di (external author)
  •   Wang, Wenxian (external author)
  •   Bai, Zhongchao (external author)
  •   Dou, Shi Xue

Publication Date


  • 2020

Citation


  • Lu, Z., Zhai, Y., Wang, N., Zhang, Y., Xue, P., Guo, M., Tang, B., Huang, D., Wang, W., Bai, Z. & Dou, S. (2020). FeS2 nanoparticles embedded in N/S co-doped porous carbon fibers as anode for sodium-ion batteries. Chemical Engineering Journal, 380 122455-1-122455-9.

Scopus Eid


  • 2-s2.0-85070493841

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3908

Has Global Citation Frequency


Start Page


  • 122455-1

End Page


  • 122455-9

Volume


  • 380

Place Of Publication


  • Netherlands

Abstract


  • FeS2 is a promising electrode material for sodium ion batteries (SIBs) because of its high theoretical capacity, rich reserves, and eco-friendly nature. In this study, N and S doped (N, S-co-doped) carbon fibers (CFs) encapsulated FeS2 nanoparticles (5ā€“12 nm) and adherent FeS2 nanoflakes (denoted as FeS2@CF-NS), were synthesized by electrostatic spinning and subsequent thermal treatment. In this structure, the FeS2 nanoparticles and the FeS2 nanoflakes shorten the Na+ diffusion distance; the N, S co-doping and defect-rich sites in the carbon fibers accelerate the Na+/eāˆ’ transmission and buffer the volume expansion during the Na-FeS2 conversion reaction. These merits synergistically contribute to the notable sodium storage performance of FeS2@CF-NS. As anode for Na-ion half batteries, the FeS2@CF-NS exhibits high capacity (637.1 mAh/g at 1 A/g after 400 cycles) and excellent rate capacity (431.1 mAh/g at 5 A/g). Kinetic analysis confirms that this composite structure stimulates the pseudocapacitance Na+ storage mechanism and enables a capacitive contribution ratio as high as 92.7% with respect to the total capacity. In combination with Na3V2(PO4)3-C cathode, the FeS2@CF-NS also achieves remarkably high specific capacity (561.1 mAh/g at 1 A/g after 500 cycles) and stable cyclability (338.6 mAh/g at 5 A/g after 5000 cycles) in full cells.

Authors


  •   Lu, Zhenxiao (external author)
  •   Zhai, Yanjun (external author)
  •   Wang, Nana
  •   Zhang, Yaohui (external author)
  •   Xue, Pan (external author)
  •   Guo, Meiqing (external author)
  •   Tang, Bin (external author)
  •   Huang, Di (external author)
  •   Wang, Wenxian (external author)
  •   Bai, Zhongchao (external author)
  •   Dou, Shi Xue

Publication Date


  • 2020

Citation


  • Lu, Z., Zhai, Y., Wang, N., Zhang, Y., Xue, P., Guo, M., Tang, B., Huang, D., Wang, W., Bai, Z. & Dou, S. (2020). FeS2 nanoparticles embedded in N/S co-doped porous carbon fibers as anode for sodium-ion batteries. Chemical Engineering Journal, 380 122455-1-122455-9.

Scopus Eid


  • 2-s2.0-85070493841

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3908

Has Global Citation Frequency


Start Page


  • 122455-1

End Page


  • 122455-9

Volume


  • 380

Place Of Publication


  • Netherlands